Eric Stanley Dexter
Event date: 06/10/1904
Event type: Birth registration
Registration details: 1904/B/9305
Mother: Ethel Maud Capner
Father/parent: Samuel Dexter
.
Leonard Samuel Dexter
Event date: 26/10/1908
Event type: Birth registration
Registration details: 1908/C/3340
Mother: Ethel Maud Capner
Father/parent: Samuel Dexter
.
Phyllis Gertrude Dexter
Event date: 12/12/1917
Event type: Birth registration
Registration details: 1918/C/918
Mother: Ethel Maud Capner
Father/parent: Samuel Dexter
.
Joan Elaine Dexter
Event date: 11/11/1919
Event type: Birth registration
Registration details: 1919/C/12625
Mother: Ethel Maud Capner
Father/parent: Samuel Dexter
.
Those links, by the way, are the sources.